2018年12月31日
70. Climbing Stairs
摘要： You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can you cl 阅读全文
posted @ 2018-12-31 00:26 Schwifty 阅读(175) 评论(0) 推荐(0)